Houston vs San Antonio Air Quality Comparison

Which city has cleaner air right now, from the latest EPA AirNow AQI

As of November 8, 2026, Houston, TX has cleaner air than San Antonio, TX — AQI 47 (Good) vs 54 (Moderate), a gap of 7 AQI points in the latest EPA AirNow observations. Lower AQI means cleaner air. Houston's reading is driven by PM2.5 and San Antonio's by PM2.5.

Houston, TX

Good

StateTexas
Dominant PollutantPM2.5
CategoryGood
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San Antonio, TX

Moderate

StateTexas
Dominant PollutantPM2.5
CategoryModerate
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Summary

Houston has 7 points better air quality

Houston has an AQI of 47 compared to 54

Our Pick

Extra Protection for San Antonio Homes

Air quality in San Antonio is moderate (AQI 54), with fine particles (PM2.5) the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.

Large Room4.6(8,000+ ratings)
Coway AP-1512HH Mighty
True HEPA + carbon · CADR ~246 CFM · rooms up to 361 sq ft
True HEPA + carbon, high CADR — clears PM2.5 from most rooms fast, our all-round pick
~$230
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Compare top-rated True-HEPA purifiers:

Large Room
Coway AP-1512HH Mighty
HEPA + Carbon
True HEPA + carbon · CADR ~246 CFM · rooms up to 361 sq ft
~$2304.6
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Editor's Pick
Levoit Vital 200S
True HEPA
True HEPA · washable pre-filter · rooms up to 1,875 sq ft
~$2004.6
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Budget Pick
Levoit Core 400S
True HEPA
True HEPA · CADR ~141 CFM · rooms up to 219 sq ft
~$1004.7
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Prices are approximate and subject to change. As an Amazon Associate, we earn from qualifying purchases at no extra cost to you.

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